Summary of Transactions with Each of the Company's Other Investees (Detail) - USD ($) $ in Thousands		3 Months Ended		6 Months Ended
		Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Schedule Of Equity Method Investments [Line Items]
Total revenues		$ 294,652	$ 8,974	$ 409,013	$ 552,590
AC JV, LLC | Film rentals and advertising
Schedule Of Equity Method Investments [Line Items]
Event fees	[1]			587	2,258
Digital Cinema Distribution Coalition
Schedule Of Equity Method Investments [Line Items]
Payments for content delivery services	[1]			211	208
FE Concepts, LLC | Theatre Services
Schedule Of Equity Method Investments [Line Items]
Total revenues	[2]			$ (31)	$ (10)

[1] Included in film rentals and advertising costs on the condensed consolidated statements of income.

[2] Included in other revenues on the condensed consolidated statements of income.